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Fix a possible miscompilation of cabac with old (broken) compilers.

This commit is contained in:
Carl Eugen Hoyos 2011-08-03 13:09:42 +02:00
parent 08d2cee49c
commit 324b8adca4
1 changed files with 9 additions and 3 deletions
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12
libavcodec/x86/cabac.h
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@ -87,13 +87,19 @@
static av_always_inline int get_cabac_inline_x86(CABACContext *c,
uint8_t *const state)
{
int bit, tmp;
int bit, low, range, tmp;
__asm__ volatile(
"movl %a6(%5), %2 \n\t"
"movl %a7(%5), %1 \n\t"
BRANCHLESS_GET_CABAC("%0", "%5", "(%4)", "%1", "%w1", "%2",
"%3", "%b3", "%a6")
:"=&r"(bit), "+&r"(c->low), "+&r"(c->range), "=&q"(tmp)
"%3", "%b3", "%a8")
"movl %2, %a6(%5) \n\t"
"movl %1, %a7(%5) \n\t"
:"=&r"(bit), "=&r"(low), "=&r"(range), "=&q"(tmp)
:"r"(state), "r"(c),
"i"(offsetof(CABACContext, range)), "i"(offsetof(CABACContext, low)),
"i"(offsetof(CABACContext, bytestream))
: "%"REG_c, "memory"
);